vital

極めて重要な、不可欠な

物事の成功や実現のために、とても重要で欠かせない様子。

やさしい英語で： Extremely important and needed for something to succeed or happen.

• Your help is vital.
• She played a vital role in the project.
• It is vital to save a copy of your work.

使い方： vital to/for something (Good communication is vital to success.); it is vital to do something (It is vital to check the address.); it is vital that… (It is vital that everyone arrives on time.)

類義語： essential, crucial, critical, indispensable

反対語： unimportant, nonessential

よく使う表現： vital role, vital information, vital to success

生命に不可欠な

人や動物、植物が生き続けるために必要な様子。

やさしい英語で： Necessary for a person, animal, or plant to stay alive.

• Water is vital for plants.
• The body needs these vital nutrients.
• Oxygen is vital to the survival of many animals.

使い方： vital to something (Oxygen is vital to human life.); vital for something (Clean water is vital for survival.)

類義語： essential, necessary, indispensable

反対語： nonessential

よく使う表現： vital to life, vital for survival, vital nutrients, vital organ

生命の、生体の

生命や生きている体の働きに関する様子。

やさしい英語で： Connected with life and the way a living body works.

• The nurse checked his vital signs.
• The medicine affects several vital functions.
• Breathing and digestion are vital processes.

類義語： lifely

よく使う表現： vital signs, vital functions, vital processes